Recent content by hellokitty

I don't have any formulas to even begin solving the problem. i just know f= v/x an f= 1/period? My book does not have any formulas pertaining to tension and the teacher never taught us this information.

Homework Statement A guitar string with a linear density of 2.0 g/m is stretched between supports that are 60 cm apart. The string is observed to form a standing wave with three antinodes when driven at a frequency of 420 Hz. What is the tension in the string?

How do I solve for the wavelength if the wavelength is not given?

Homework Statement A Doppler blood flow unit emits ultrasound at 5.0 {\rm MHz}. What is the frequency shift of the ultrasound reflected from blood moving in an artery at a speed of 0.20 m/s? What equations would I use to calculate the doppler shift? It is not in my textbook...

the problem is asking to solve for Vs from the formula that I have attached. But I do not know how to rearrange it to where I can solve for Vs. I have everything else in the formula but I do not know how to rearrange it...

I know which equations to use for solving Doppler Effect problems, so figuring out which is the observer and which is the source and which is moving or stationary is not the problem, the problem I am having is in solving the actual formulas... This question might belong in the math help section...

Homework Statement A concert loudspeaker suspended high off the ground emits 36 W of sound power. A small microphone with a 1.0 cm^2 area is 48m from the speaker. What is the sound intensity at the position of the microphone? What is the sound intensity level at the position of the...

Okay so I solved for V(0)= w * A= 412.723 The conservation of momentum is: V0= ( m1+ m2/ m1) * Vf Vf= 412.723/ 10.8 = 38.166 But that answer is wrong...so what do I do now?

Can someone explain HOW to solve it? I understand that g=gravity=9.81. So what now? How do it solve the fraction? I know it is not 9.81/acceleration or acceleration/9.81...

Homework Statement A small earthquake starts a lamppost vibrating back and forth. The amplitude of the vibration of the top of the lamppost is 6.5 cm at the moment the quake stops, and 8.0s later it is 1.8 cm. What was the time constant for the damping of oscillation? What's the...

hmm...i didnt get it right.. can some one show me how to do it step by step??

Homework Statement A 1.08 kg block is attached to a horizontal spring with spring constant 3650 N/m. The block is at rest on a frictionless surface. A 10.6 g bullet is fired into the block, in the face opposite the spring, and sticks. What was the bullet's speed if the subsequent...

Another question: Astronauts on the first trip to Mars take along a pendulum that has a period on Earth of 1.50 s. The period on Mars turns out to be 2.45 s. My answer: I used the equation T=2pi √ (L/g) I first plugged in the 1.5s = 2pi √ (L/9.8) and found L = .5585 Then I plugged...

no, this was the entire question. I guess the mass and angle is there to play mind tricks.

I just realized that I didn't use the mass or degree of angle in solving the question. Is there a way to answer this question using another equation?